Metal-organic frameworks derived N, S co-doped bimetal nanocomposites as high-performance electrodes materials for supercapacitor

Nitrogen sulfur co-doped bimetal nanocomposites (NS-BNs) are prepared through vulcanization and annealing using bimetallic Ni/Co-MOF as a precursor. The nitrogen sulfur co-doped bimetal nanocomposites have abundant electroactive sites and redox reaction centres, which exhibit remarkable electrochemical performance as electrode materials for supercapacitor. The specific capacitance could reach 1529 F g(-1) at a current density of 1 A g(-1) and excellent cycle stability (retention rate of 89.29% after 10000 cycles). After the current density is expanded ten times, the specific capacitance can still reach 1069 F g(-1), indicating superior rate performance. Furthermore, the assembled asymmetric supercapacitor displayed a high energy density of 41.04 Wh kg(-1) at power density of 750 W kg(-1). As a result, non-metal doped nanocomposites material has promised applications for electrochemical supercapacitors. (C) 2019 Elsevier B.V. All rights reserved.